baber/WOPTO huggingface dataset:
Patent KR-820001428-B1 (KR)
Title: Process for the preparation of the fire extinguishing a protein form
Inventor: IM S
IPC: A62D1/00
Filed: 1981-06-10
Granted: 1982-08-14
Abstract: A method of preparing fire-extinguishing protein foam is improved.  Thus, protein source was hydrolysed with Ca(OH)2, neutralized with CO2 to pH 7.0 and Ca ion was salted out as CaCO3.  For example, keratin 200g was hydrolysed with Ca(OH)2, filtered and CO2 gas was incorporated to the filtrate 1200 cc at 70≰C.  CO2 28g was suspended to neutralize to pH 7.0  The reaction product, CaCO3 is removed by filtration and concentrated.
Patent KR-880001349-B1 (KR)
Title: Microbicidal compositions for industrial use
Inventor: MASATO MAGAMI
IPC: A01N43/80
Filed: 1982-04-08
Granted: 1988-07-28
Abstract: A novel germicidal and inhibitary composition for industrial use contains 8:1-1:28 ratio of 4,5-dichloro-1,2-dithiol-3-one (DDO) and 1,2-benzisothiazolin (BITO) by wt..  Hydrophilic org. solvent i.e. DMF, glycoles and dispersant i.e. cationic, anionic or nonionic surface active agent are also contd. in the novel compsn.  When e.g. 0.8% (W/W) of DDO, 10.0% of BITO, 89.0% of diethylene glycolemonomethylether and 0.2% of tetronic 702 are added into papermaking machine for 6hrs continuously to be 0.8ppm of DDO and 10 ppm of BITO after cleaning, there is no split on paper caused by slime after 4-week-run operations.
Patent KR-880001802-B1 (KR)
Title: Component inserting machine
Inventor: WRIGHT HENRY L
IPC: H05K13/04
Filed: 1982-06-08
Granted: 1988-09-17
Abstract: The machine selects electronic components from magazines containing a variety of configured components.  The components in each of the magazines have a different centre line spacing from the centre line spacing the components of each of the other magazines.  Each magazine has control unit indicating the partic. configured components contained in the magazine for providing signals for controlling the setting of component conditioning and inserting devices for operating on each component according to its partic. configuration.  Each component before application to a circuit board is fed along a mandrel and located by engagement of its leads with a stop.
Patent KR-840001101-B1 (KR)
Title: The method for manufacturing gel-type food
Inventor: BANG GYE-BYONG
IPC: A23L21/10
Filed: 1982-12-23
Granted: 1984-08-06
Abstract: Gel-type foods are manufd. by adding carboxymethylcellulose or carboxymethyl starch. Thus, 3.5g alum was dissolved in 500g H2O and reacted with 2.5g NaHCO3. The resulting mixt. was blended with 35g soybean powder, which was steamed with 7g carboxymethyl starch. This soln. was mixed with 3.5g Δ-lactone gluconate for ˜5 min and packed. After 30 mins. a gel-type food was produced.
Patent KR-850001203-B1 (KR)
Title: Control device in elevator
Inventor: KIM JONG-O
IPC: B66B1/00
Filed: 1983-12-19
Granted: 1985-08-20
Abstract: A system operates to save passengers during a state of emergency when the elevator is out of order. The controlling circuit comprises a detecting element (100), which detects the moving direction before the elevator stops at any other zones except a door open zone; a commanding element (200), which orders the save command into the rescue up or the rescue down of the elevator; a time element (300), which controls the elevator when it does not moved after a designated time; and an alarm element (400), which indicates inoperability of the save.
Patent KR-910003400-B1 (KR)
Title: Toy building block with electrical contacts
Inventor: BOLLI PETER
IPC: A63H33/04
Filed: 1984-02-14
Granted: 1991-05-30
Abstract: A building block is provided having side walls and a top face with two rows of coupling pins on the one side of the top face and counter-coupling tubes on the other side for mechanically coupling two such building blocks by means of a clamping action. On their side faces, the coupling pins have electrically conducting regions, which extend over an angular range. The angular range of one row being turned by 180 DEG  relative to those of the other row. All the conducting regions are connected to a contact bar, which is arranged on the side of the counter-coupling tubes along one side wall. When two building blocks are coupled arbitrarily, at least one conducting region of each row of coupling pins of the one building block makes contact with a contact bar of the other building block in such a way, that a short circuit cannot occur in the two electrical circuits assigned to each row of coupling pins or each contact bar.
Patent KR-930003291-B1 (KR)
Title: Work pallet charger for machine tool
Inventor: MIYATA ICHIRO
IPC: B23Q11/00
Filed: 1984-07-23
Granted: 1993-04-24
Abstract: The present invention relates to a work pallet changer which changes a work pallet (4) fittet on the pallet fixing decive (2) on the table (1) of a machine tool (M), comprising movable mounting parts (12a), disposed on a rotary carrier which is rotatable about a horizontal axis (16a), to allow transferring a work pallet between a pallet mounting part located on the top surface of said rotary carrier and the pallet fixing device, and at the same time, letting chips produced by cutting fall down from a work pallet which faces downwardly.
Patent KR-870001730-B1 (KR)
Title: Feeding bottle
Inventor: ATKIN EDWARD
IPC: A61J11/02
Filed: 1984-12-31
Granted: 1987-09-26
Abstract: The bottle has a body with capacity of 25-40 ml/cm and a neck for attachment of a teat and with a mean cross-sectional area not less than 0.45 that of the body.  The body capacity is pref. 30-35 ml/cm and its mean dia. not less than 6cm, and the neck has a mean dia. not less than 0.725 that of the body.  The body is pref. marginally waisted and a flanged teat of moulded silicone rubber is attached to the bottle by an annular cap with the flange held against the neck rim.  Both neck and cap pref. have an interrupted screw thread so that the cap can be screw fitted to the bottle.
Patent KR-920002058-B1 (KR)
Inventor: HAKANSON SVEN
IPC: B01D21/02
Filed: 1985-01-22
Granted: 1992-03-10
Abstract: 내용 없음.
Patent KR-900001454-B1 (KR)
Inventor: ONO ITSMI
IPC: H01R12/52
Filed: 1985-05-07
Granted: 1990-03-10
Abstract: 내용 없음.
Patent KR-900001873-B1 (KR)
Inventor: FUJAMACHI TOSHIO
IPC: B01F3/04
Filed: 1985-06-14
Granted: 1990-03-26
Abstract: 내용 없음.
Patent KR-890000219-B1 (KR)
Title: Automatic tracking device
Inventor: LEE KYU-CHANG
IPC: G11B15/52
Filed: 1985-08-05
Granted: 1989-03-10
Abstract: The invention provides a tracking device in that a control pulse signal is automatically delayed for the image signal regenerated by heads (CH1, CH2) to have a time period from the head switching signal, that is to the maximum length of the image signal, so as to make the heads to precisely trace the tape tracks.  The device includes a microprocessor (5) for delaying a control pusle signal for a time, triggerable integrator (8), error signal generator (9), delay signal generator (10), and display unit (11).
Patent KR-920007269-B1 (KR)
Inventor: IMHOFF RENE
IPC: C07D241/06
Filed: 1985-08-27
Granted: 1992-08-29
Abstract: 내용 없음.
Patent KR-900002631-B1 (KR)
Title: Image data processing method and apparatus
Inventor: INOUE TOSHIHUMI
IPC: G09G5/39
Filed: 1985-09-28
Granted: 1990-04-21
Abstract: The present invention makes it possible to reduce the processing time by dividing an image, which is to be subjected to a processing, into a number of sections and subjecting the divided images to an image processor in a limited memory space, esp. by making most effective use of the memory spaces of buffer memories to reduce the number of divisions of the original picture when a high speed affined transformation is performed in the buffer memories.  The data are stored as image data in a memory having a large capacity and a relatively low access speed.
Patent KR-880000039-B1 (KR)
Title: Process for producing 5'-inosinic acid 2 potassium salts(i m p 2k)
Inventor: CHANG HUI-JIN
IPC: A23L27/40
Filed: 1985-10-08
Granted: 1988-02-20
Abstract: Crystalline 5'-inosinic acid 2 potassium salt was prepd.. Thus, 1 l of acidin soln. of 100g inosinic acid 1 l purified from ion-exchange resin was adjusted to pH3.8 by dropping 50ml of 50% KOH soln. and vacuum-concentrated with heating to give a soln. of 430g inosinic acid 2 potassium 1 l. 320ml methanol was dropped into the concd. soln. at room temp. to give 96g of crystalline 1MP 2K.  5H20.
Patent KR-890002494-B1 (KR)
Title: Compact creel for large diameter yarn supply packages
Inventor: BLUHM DIETER H
IPC: D02H1/00
Filed: 1985-11-14
Granted: 1989-07-10
Abstract: The creel supports large diameter packages (P) as pairs tailed together at their confronting delivery ends.  The angle between the lengthwise axes of each pair of packages being more than 90 deg. and pref. an obtuse angle between 90 and 180 deg.  A yarn withdrawal guide system has an eye (63) at the intersection of the axes of the packages, and directs yarn to a processing machine.  The creel has three decks of packages spaced vertically, and each deck has four pairs of packages (43,44).
Patent KR-940011082-B1 (KR)
Inventor: WAKAHARA TATSUYA
IPC: G04G5/00
Filed: 1985-12-10
Granted: 1994-11-23
Abstract: 내용 없음.
Patent KR-890005093-B1 (KR)
Title: Bead glass of a discharge tube
Inventor: CHONG GI-HO
IPC: C03C4/14
Filed: 1986-03-04
Granted: 1989-12-11
Abstract: A bead glass for passing impulse current in discharge tube is prepared by mixing 100 parts SiO2, 20 parts Pb3O4, 1 parts Na2CO3, 20 parts Se, 10 parts ZnO, 1 parts K2CO3, 1 parts KNO3 by weight for 10 minutes, pouring into a crucible at 500≰C, heating upto 1200-1300≰C for 3-4 hours, keeping up at that temperature for 15-17 hours, forming into long tube type, cutting in any length. The producted bead glass is served as an electric conductor in an impulse current and an insulator in a normal current.
Patent KR-940003706-B1 (KR)
Inventor: WILSON JOHN F
IPC: G21C19/33
Filed: 1986-03-24
Granted: 1994-04-27
Abstract: 내용 없음.
Patent KR-940009080-B1 (KR)
Inventor: KWIATROWSKI JEAN-CLAUDE
IPC: G11C11/411
Filed: 1986-03-27
Granted: 1994-09-29
Abstract: 내용 없음.
Patent KR-900007870-B1 (KR)
Title: Process for the preparation of repeating block oligomer-free polyphase thermoformable polyurethane
Inventor: COLLINS GUY R
IPC: C08G18/48
Filed: 1986-08-06
Granted: 1990-10-22
Abstract: A repeating block, polyphase, thermoplastic polyurethane is obtd. by reacting an isocyanate-terminated prepolymer (I); opt. additional diisocyanate (II); an amt. of a chain-extender (III) sufficient to give isocyanate index 1.025-1.035; and a catalyst (IV). (I) consists of n-branched, polyether glycol residues joined through intervening carbamate gps. with (n+1) diisocyanate residues (n=1-4), and is obtd. by completing reacting 1 mole methylolterminated branched polyether glycol (Ia) opt. in the presence of a catalyst. (Ia) has mol.  wt. 1000-6000 and consists of chains of -C-CRR'-CH2- units, where R, R' is H, Me or Et with a preponderance of units in which R and R' are not both H.
Patent KR-920006598-B1 (KR)
Inventor: SHIMIZU SATOSHI
IPC: A63C9/086
Filed: 1986-12-26
Granted: 1992-08-10
Abstract: 내용 없음.
Patent KR-920004811-B1 (KR)
Inventor: HAMADA SHIBEI
IPC: C08K3/40
Filed: 1987-01-30
Granted: 1992-06-18
Abstract: 내용  없음.
Patent KR-950002886-B1 (KR)
Inventor: KISE MASAHIRO
IPC: C07D513/04
Filed: 1987-07-01
Granted: 1995-03-28
Abstract: 내용 없음.
Patent KR-950006814-B1 (KR)
Title: Method of making a water laid fibrous web
Inventor: WILLIS ANTHONY JOHN
IPC: D21H17/00
Filed: 1987-07-27
Granted: 1995-06-22
Abstract: A method of making a fibrous web containing at least two particulate materials and which includes mixing the dry particulate materials together in a substantially dry condition, using the dry mix to form at least part of an aqueous dispersion of fibres, and draining the dispersion to form a web.
Patent KR-950010192-B1 (KR)
Inventor: VICS IAN STADMAN
IPC: C08J5/02
Filed: 1987-07-27
Granted: 1995-09-11
Abstract: 내용 없음.
Patent KR-940010094-B1 (KR)
Inventor: YAGI HIDEO
IPC: C04B24/20
Filed: 1987-07-30
Granted: 1994-10-21
Abstract: 내용 없음.
Patent KR-900003329-B1 (KR)
Title: Aromatic polymide pulp and that's process of manufacture
Inventor: RYU SUK-CHUL
IPC: D01F6/60
Filed: 1987-10-31
Granted: 1990-05-14
Abstract: adding inorg. salts (pref. 0.5-20% w/v w.r.t. the polymn. solvent) and tamine solvent or the mixed solvent thereof in amide based polymn. solvent or the mixed solvent theeof; polymerizing by heavy stirring to make gel in aromatic diamine and diacid chloride of the same mole at below 50≰C; stop stirring after gelation, then heating at 5-350≰C for 1 min. -2hr. to separate the solvents; first pulverizing in presence of N2 gas; and directly pulverizing in the solvent comprising water or amide based solvent or t-amine based solvent or the mixed solvents thereof.
Patent KR-910001957-B1 (KR)
Inventor: LANDRY VINCENT
IPC: G11B23/023
Filed: 1988-01-27
Granted: 1991-03-30
Abstract: 내용 없음.
Patent KR-920001484-B1 (KR)
Title: Transfer paper and process for using the same
Inventor: PARK NAN-SU
IPC: B41M1/30
Filed: 1988-02-04
Granted: 1992-02-15
Abstract: A transfer paper for heat-resistant,  non-absorbing  surfaces is prepared by finely coating transfer film solution for releasing on transfer board. The  transfer  film  solution  is  obtained  by adding 0.05-2 parts non-ionic surfactant of HLB value 5-18 to  100 parts of  solid  portion  of  acrylic  copolyaer  resin  solution. Especially  the  surfactant  is  polypropylene  glycol  having   a molecular weight of 500-3000. The process for transfering patterns onto  the  porcelaim  surface  using  the  above  transfer   paper comprises (A) releasing printed transfer film from transfer paper, (B) attaching the released film to  the  porcelain  surface  by  a fluid contg. more than 20 % C10-C50 hydrocarbon, and  (C)  burning it in a furance.
Patent KR-910009871-B1 (KR)
Inventor: AGUZ HIDEDOSHI
IPC: F16D23/02
Filed: 1988-03-05
Granted: 1991-12-03
Abstract: 내용 없음.
Patent KR-950001178-B1 (KR)
Title: Programmable n-counter
Inventor: LEE YONG-MIN
IPC: H03K23/00
Filed: 1988-07-14
Granted: 1995-02-11
Abstract: The Nth counter has a programmable function and economic aspect against the conventional timers. The counter comprises; a counter (CNT1) with input terminals composed of full adders (FA1,FA2), an AND gate (G1) and inverters (I1-I4); the inverter (I5) and OR gates (G2-G4) taking logic operation to obtain the pulse (OUT1) divided by 1/N; a flip-flop (FF1) generating the square wave divided by 1/2N; an OR gate (G5) generating the load signal of the counter (CNT1) by logic operation between input load signal (LD) and output signal (QD).
Patent KR-910007651-B1 (KR)
Inventor: MISURARI KANOU
IPC: G06K9/20
Filed: 1988-12-19
Granted: 1991-09-28
Abstract: 내용 없음.
Patent KR-960016073-B1 (KR)
Inventor: TOTSUDO RICHARD GATSUSO
IPC: H01B3/12
Filed: 1989-03-24
Granted: 1996-11-27
Abstract: 없음
Patent KR-920004108-B1 (KR)
Inventor: GODO GENSUKE
IPC: G06F7/50
Filed: 1989-03-25
Granted: 1992-05-25
Abstract: 내용 없음.
Patent KR-910008097-B1 (KR)
Title: Manufacturing method of piezo buzzer
Inventor: LEE EUN-SOO
IPC: G10K9/00
Filed: 1989-05-31
Granted: 1991-10-07
Abstract: The method for manufacturing a piezoelectric buzzer comprises forming an electrode (2) composed of Ag on one side surface  of  a piezoelectric buzzer sintered body (1), the other surface being  a minus common terminal (5), and connecting a plus terminal  (4)  to the  electrode  (2)  to  polarization-treating  them.  The  method reduces a number of processes.
Patent KR-920003607-B1 (KR)
Title: Benzoxazole derivatives and its preparation process
Inventor: RYU SANG-EUN
IPC: C07D413/04
Filed: 1989-05-31
Granted: 1992-05-04
Abstract: 5-[5-[2-(4-Fluorophenyl)benzoxazolyl  -(1H)-tetrazole      of formula (I) is new. Also  claimed  is  the  prepn.  of  (I)  which comprises (a) reacting a carboxylic acid deriv.  of  formula  (II) with  3- amino-4-hydroxy  benzonitrile  of   formula   (III),   (b) dehydrating the obtd. amide deriv., and  (c)  reacting  the  obtd. cpd. with an azide cpd. selected from NaN3, Al(N3)3 or trialkyltin azide. The cpd. (I) has an effect on the blood pressure and on the contractility of cardiac muscle.
Patent KR-920009562-B1 (KR)
Inventor: KAMIO HIROSHI
IPC: C30B15/04
Filed: 1989-07-07
Granted: 1992-10-19
Abstract: 내용 없음.
Patent KR-930002519-B1 (KR)
Title: Casting device, method for using the device, casting device of vehicle wheel, method for using the device and vehicle wheel
Inventor: KATO TAKASHI
IPC: B22C9/28
Filed: 1989-07-31
Granted: 1993-04-03
Abstract: A method for casting a vehicle wheel using a casting device is disclosed, in which the has a mold provided with a main body (M), a casting space (4) and a gate (43). The main body (M) of the mold includes a casting space section (453) for forming the rim of the wheel, and the gate (43) is arranged at one side of said casting space section (453) and opens into said casting space section. During casting and cooling the wheel, the disk portion of the wheel is partially and separately forcefully cooled. A vehicle wheel casted with this method has miniaturized structure. As only the hub portion is forcefully cooled, the necessary tensile strength of the bolt hole in the hub portion can easily be obtained at low cost. <IMAGE>
Patent KR-930001537-B1 (KR)
Inventor: FREEMAN GLENN E
IPC: G02B5/32
Filed: 1989-08-30
Granted: 1993-03-04
Abstract: 내용 없음.
Patent KR-920006996-B1 (KR)
Inventor: TOMIYAMA GAZUNOBU
IPC: G11B5/596
Filed: 1989-09-18
Granted: 1992-08-24
Abstract: 내용 없음.
Patent KR-920005290-B1 (KR)
Inventor: TAMURA ICHIRO
IPC: G06F13/14
Filed: 1989-12-23
Granted: 1992-06-29
Abstract: 내용 없음.
Patent KR-940002697-B1 (KR)
Title: Apparatus and method for hydroenhancing fabric and the hydroenhanced fabric
Inventor: STERNLIEB HERCHEL
IPC: B05B1/02
Filed: 1989-04-14
Granted: 1994-03-30
Abstract: An apparatus (10) and related process for enhancement of woven and knit fabrics through use of dynamic fluids which entangle and bloom fabric yarns. A two stage enhancement process is employed in which top and bottom sides of the fabric are respectively supported on members (22), (34) and impacted with a fluid curtain including high pressure jet streams. Controlled process energies and use of support members (22), (34) having open areas (26), (36) which are aligned in offset relation to the process line produces fabrics having a uniform finish and improved characteristics including, edge fray, drape, stability, abrasion resistance, fabric weight and thickness.
Patent KR-0160502-B1 (KR)
Inventor: MICHAEL EDWARD GRIFFIN
IPC: H04L29/08
Filed: 1990-03-20
Granted: 1998-12-01
Abstract: 내용 없음.
Patent KR-920010653-B1 (KR)
Title: Conveyor system
Inventor: OH DAE-KI
IPC: B65G15/00
Filed: 1990-04-14
Granted: 1992-12-12
Abstract: In a conveyor for assembly work,  first  and  second  feeding lines are set on the  upper  part  of  a  frame  and  pallets  are circulated by driving chaines. Third and fourth feeding lines  are set on the lower part of the frame and their pallets are circulted in the direction opposite to those of the first and second feeding lines. A operating rod  is  installed  on  the  first  and  second feeding lines to stop and feed the pallets at a certain  interval. A operating members and a rollers are installed on both  ends  for up and down movements to shaft in middle. A cylinder and a  lifter are mounted on a place of the second feeding line.
Patent KR-0140206-B1 (KR)
Inventor: MINAGAWA FUMIYASA
IPC: A01N25/08
Filed: 1990-05-26
Granted: 1998-07-01
Abstract: 내용없음
Patent KR-930000805-B1 (KR)
Title: Passive seat belt system
Inventor: HAN CHONG-KI
IPC: B60R22/48
Filed: 1990-07-02
Granted: 1993-02-05
Abstract: The apparatus makes it possible to  start  the  vehicle  only when the driver fastens the safety belt by assembling a switch  to a conventional safety belt.  The  apparatus  comprises  a  support plate (2), positioned in the upper part of a safety  belt  fixture (1), having a connection groove (2a); a connection piece (13) of a hook inserted into the connection groove (2a) and pressing a guide device (3); a hooking groove (3a) formed in the upper part of  the guide device (3); a connection switch main body (6) fixed  to  one side of a support  (5);  conductive  terminals  (7,7')  positioned within the switch main body (6); a contact terminal (9)  supported by a spring (11);  a  start  terminal  (18)  of  a  key  box  (17) connected to the conductive terminals (7,7').
Patent KR-930000699-B1 (KR)
Title: Signal voice detecting device for facsimile telegraph
Inventor: CHOE HAE-YOL
IPC: H04N1/00
Filed: 1990-07-05
Granted: 1993-01-29
Abstract: The circuit detects the telephone line state connected to the facsimile, which operates by detecting the interrupt  ring  period (being greater than 100 msec.) including in the input signal  ring of 100-640 Hz. The circuit comprises a full wave  rectifier  (510) providing the rectified saw wave after mixing the rectified signal ring  and  the  initial  input  signal,  and  a  comparator  (520) comparing the output of the rectifier to the reference voltage and detecting the interrupt ring period of the signal ring.
Patent KR-920005291-B1 (KR)
Title: A method and an apparatus for saving delete-bit of cd-rom
Inventor: CHONG SONG-HYON
IPC: G11B20/18
Filed: 1990-08-09
Granted: 1992-06-29
Abstract: The circuit includes a beginning address  register  (31)  for storing a beginning address data. A sub-block counter (32)  counts clock bytes of a clock terminal (CK) to generate sub-block address data, and a multiplexer  (34)  selects  values  to  increment  the stored values of the  beginning  address  register  (31)  and  the values of respective lines.  A  counter  (35)  counts  the  output values of the multiplexer (34) to generates data to a data address bus. A comparator  (37)  compares  the  output  of  the  sub-block counter (32) and the values of the last lines of the sub-blocks. A deletion address data generating section  (38)  supplies  deletion address data by comparing the output of the comparator  (37)  with the values of the last lines.
Patent KR-930003346-B1 (KR)
Title: Method for producing various identification cards preventing forgery and/or falsification
Inventor: KIM YANG-PYONG
IPC: B42D25/346
Filed: 1990-08-20
Granted: 1993-04-26
Abstract: The method punches a  card  paper  for  the  position  of  an identification picture by superimposing the picture on  the  paper to be pinched out together. The  picture  is  separated  from  the punched paper and is placed  back  to  fill  exactly  the  punched opening to be covered with a thin transparent lamination film of a little larger in size than the picture. The card paper having  the picture laminated is placed between two lamination films to be hot rolled under pressure for melt fusion for the final  product.  The thin lamination film covered over the picture includes a layer  of a release agent under the top  protective  layer  which  separates from the other layers of printing and lamination over the  picture upon application of heat to the card outer  layer  of  lamination. The remaining  other  layers  after  separation  are  composed  of materials which deform on heating to make impossible  the  removal of the picture against alteration of the card.
Patent KR-920009363-B1 (KR)
Title: Control circuit of battery charge
Inventor: JU YONG-JIN
IPC: H02J7/00
Filed: 1990-12-06
Granted: 1992-10-15
Abstract: The  charge  control  circuit  for  converting  the  charging current of battery to frequency signal  to  display  the  charging state of the battery comprises a constant voltage supply unit (1), a voltage/ frequency converter (2) for detecting a voltage  between both ends of a resistor (R1) and supplied from the unit (1) to the battery (Bt1) through a diode  (D1)  to  convert  the  voltage  to frequency signal, a  counter  (3)  receiving  the  freq.-converted pulse signal from the converter (2),  an  A/D  converter  (4)  for converting an output of the counter (3) to  an  analog  signal,  a control unit (5) for receiving an output of the A/D converter  (4) to control the constant voltage supply unit (1) and a display unit (6) for displaying the charging state.